Mix eggs, milk, and butter in a large bowl.
Add flour, baking powder, sugar and salt.
Use a fork or whisk to combine the dry ingredients before mixing them into the wet ingredients.
Heat your cast iron griddle until water bounces on it.
Put 1 tablespoon bacon grease in griddle.
Use a soup ladle to measure batter for pancakes. (My rectangular cast iron griddle can do nine medium-sized pancakes at a time.)
Cook until the bottom of the pancake is brown and you see bubbles that break on top.
Flip and cook for one minute more.
Remove the first batch to a plate.
Regrease the pan with the remaining bacon grease and cook your second batch.
Repeat as needed!